On Windows OpenVPN by default installs one TAP network interface. If you want to connect to multiple VPNs simultaneously you need an interface for each VPN.

You can add a additional adapter by a batch file provided by the TAP driver. Open a command prompt with administrative rights and change to the TAP install folder.

c:\> cd "C:\Program Files\TAP-Windows\bin"

and call

addtap.bat

Example:

C:\Program Files\TAP-Windows\bin>addtap.bat

C:\Program Files\TAP-Windows\bin>rem Add a new TAP virtual ethernet adapter

C:\Program Files\TAP-Windows\bin>"C:\Program Files\TAP-Windows\bin\tapinstall.exe" install "C:\Program Files\TAP-Windows\driver\OemVista.inf" tap0901
Device node created. Install is complete when drivers are installed...
Updating drivers for tap0901 from C:\Program Files\TAP-Windows\driver\OemVista.inf.
Drivers installed successfully.

C:\Program Files\TAP-Windows\bin>pause
Press any key to continue . . .

and check it:

cd "Program Files\OpenVPN\bin"

C:\Program Files\OpenVPN\bin> openvpn.exe --show-adapters
Available TAP-WIN32 adapters [name, GUID]:
'Local Area Connection 2' {DD2A53C5-63BD-492A-A7F4-94E724007B2A}
'Local Area Connection 3' {EF7623C03-542A-34E8-B633-E3B742983E3}

You can also rename the interfaces now through the GUI (Control Panel\Network and Internet\Network Connections).

Put your .ovpn config and certificates files to the C:\Program Files\OpenVPN\config folder and add the nobind to each config so that a dynamic (UDP) source port is used for each VPN session respective openvpn process.

When a static assignment between a VPN and specific interface is necessary add the TAP Interfacename as parameter of the dev-node option to the openvpn config file:

dev tap
dev-node "Local Area Connection 3"

• Windows 10

• https://michlstechblog.info/blog/openvpn-connect-to-multiple-vpns-on-windows/